EP0325686B1 - Walzenpresse zum Verpressen von feinkörnigen Chemikalien, insbesondere Salzen, zu Schülpen - Google Patents

Walzenpresse zum Verpressen von feinkörnigen Chemikalien, insbesondere Salzen, zu Schülpen Download PDF

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Publication number
EP0325686B1
EP0325686B1 EP88111370A EP88111370A EP0325686B1 EP 0325686 B1 EP0325686 B1 EP 0325686B1 EP 88111370 A EP88111370 A EP 88111370A EP 88111370 A EP88111370 A EP 88111370A EP 0325686 B1 EP0325686 B1 EP 0325686B1
Authority
EP
European Patent Office
Prior art keywords
pressing
roll
press according
roll press
wedge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88111370A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0325686A1 (de
Inventor
Hans-Georg Dipl.-Ing. Bergendahl
Kurt Dipl.-Ing. Zech
Raimund Dr.-Ing. Zisselmar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Koeppern GmbH and Co KG
Original Assignee
Maschinenfabrik Koeppern GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Koeppern GmbH and Co KG filed Critical Maschinenfabrik Koeppern GmbH and Co KG
Publication of EP0325686A1 publication Critical patent/EP0325686A1/de
Application granted granted Critical
Publication of EP0325686B1 publication Critical patent/EP0325686B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/18—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using profiled rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/22—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by pressing in moulds or between rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/30—Feeding material to presses
    • B30B15/302—Feeding material in particulate or plastic state to moulding presses
    • B30B15/308—Feeding material in particulate or plastic state to moulding presses in a continuous manner, e.g. for roller presses, screw extrusion presses

Definitions

  • the invention relates to a roller press according to the preamble of claim 1.
  • the material to be pressed is fed in at a temperature greater than 125 °, and the roll surface is kept at a temperature less than 80 °.
  • high-strength flakes can be produced with fine-grained salts with the usual sieve characteristics, from which granules with high abrasion resistance can be produced by comminution.
  • Roller presses for compacting fine-grain salts are normally supplied with a relatively large width, the working width usually corresponding to the roller diameter, but preferably being larger than this.
  • roller presses with a roller diameter of 1000 mm and a working width of 1250 mm are common.
  • five screw conveyors are provided, with their outputs in the axial direction of the rollers lie next to each other and are alternately inclined against the vertical plane through the nip.
  • the object of the invention is to design a roller press of the generic type in such a way that even very fine-grained salts can be compacted with it so that, with low current consumption, scales of high quality can be produced, from which highly abrasion-resistant granules can be produced.
  • the roller press shown in the drawing is intended for the compacting of very fine-grained chemicals, in particular salts such as potassium salts obtained in the flotation process, and in described below in connection with the compacting of extremely fine-grained potash salts.
  • Its basic structure is of a known type.
  • the roller press has two synchronously driven press rollers 2, 4, which are mounted in a press frame 6 in the usual way.
  • the press rolls are supported with roll journals at their ends in bearing housings 8 which are arranged between an upper and a lower frame support, one of the press rolls with their bearing housings being displaceable away from the other roll against a prestressed spring.
  • the press rolls 2, 4 are each provided with two axially spaced cylindrical press surfaces 28, 28A, against each of which there are radial shoulders 27, 29; Connect 27A, 29A.
  • the pressing surfaces can be formed on the outside on cylindrical rings which are shrunk onto the roller body. However, they can also be formed in a ring-shaped manner integrally with the roller body. The description below refers to the version with shrunk rings.
  • a bridge 12 is arranged, on which, as shown in FIG. 1, screw conveyors are arranged, the screw housings of which form the filling chutes 14 for each screw conveyor, via which the material is conveyed into the roller gap.
  • the filling shafts 14 lie directly against one another in the axial direction.
  • the screw conveyors are alternately inclined in the opposite direction to the plane E, which passes perpendicularly through the nip. Details of the screw conveyors are known.
  • the salt to be compacted passes through an inlet 16 into an intermediate bunker 18, from which the screw conveyors remove the material.
  • the screw conveyors are each located on separate feed chutes for each screw conveyor.
  • the ends of the filling chutes 14 are arranged in a plate 20, which seals off the roller gap in an upward manner.
  • the nips are provided on both sides in the axial direction, closing wedge-shaped wall elements 22, 22A, which abut against the shoulders 27, 27A of the rings 28, 28A facing away from one another.
  • These wedge-shaped wall elements 22, 22A are pressed against the shoulders 27, 27A by horizontal pressure bolts 24, 25, 26 or 24A, 25A, 26A, which are held in the area between the bearing housings 8 in the press frame 6.
  • tie rods 34, 35, 36 are mounted next to one another in a bridge 32 arranged transversely to the bridge 12, of which the tie rods 34 and 36 are indicated in FIG. 1 with their upper ends.
  • the tie rods 34 and 35 are preferably arranged at the same distance from the plane E as the horizontal pressure bolts 25 and 26.
  • the tie rod 36 lying in the plane E running perpendicularly through the nip carries at its lower end a wedge-shaped or conical collar 38 which cooperates with corresponding conical or wedge surfaces 40, 40A on the outer sides of the two wedge-shaped wall elements 30, 30A in their lower region.
  • the two outer tie rods 34, 35 are each provided with corresponding conical or wedge-shaped collars 42, 42A, which interact with corresponding conical or wedge surfaces 44, 44A in the upper region of the wedge-shaped wall elements 30, 30A.
  • the pressure is brought about by vertically adjusting the pull rods 34, 36 by means of nuts 46, 46A resting on the top of the bridge 32.
  • the pull rods 34, 35 with their collars 42, 42A thus fulfill the functions of the pressure bolts 26, 26A while the pull rod 36 with their collar 38 fulfills the function of the pressure bolt 24.
  • push rods with correspondingly arranged wedge-shaped or conical collars can also be provided.
  • the entire width B of the roller body is divided into two working widths b.
  • B is, for example, 2.5 b, the gap between the two rings then having a width b / 2.
  • the described working configuration reduces the effective working width of the two rollers 2 and 4 to two b. With a gap between the two rings with a width of b / 2, this means a reduction of the effective working width by 20%.
  • Each of the two rings 28, 28A is assigned two screw conveyors, the filling shafts 14 of which are indicated schematically in FIG. 2.
  • the bridge 32 is, as shown in Fig. 1, between the two adjacent central filling shafts 14 of the screw conveyor.
  • roller press A With the roller press A, at pressures increased up to the safety limit, slugs were produced from which about 25 tons / h of salable granules could be produced. A current consumption of 110 to 130 A was measured.
  • roller press B designed according to the invention slugs were produced from which 35 to / h of salable granules could be produced, with a current consumption of the roller press of 60 to 70 A. There was therefore a 20% increase in production output based on the granules with an almost halved one Current consumption achieved.
  • the press B designed according to the invention was characterized by a very quiet run. The increase in production output based on the granulate was achieved despite the loss of one of the screw conveyors and the associated reduction in installed output by 20%.
  • the comparative experiments were carried out with very fine-grained potassium salt with a sieve characteristic of 75 to 85% smaller than 0.4 mm (35 mesh) and 40% smaller than 0.2 mm (65 mesh).
  • the pressing surface was provided with a flat waffle profile with a profile depth of 5 mm.
  • the roller press B was profiled on the press surfaces by means of welded-on ribs, as shown in FIG. 3.
  • the profiling here has arrow-shaped interrupted ribs 48 in the direction of rotation of the roller, which corresponds to the conveying capacity and here is directed from top to bottom.
  • the arrowheads 50 located at the front in the circumferential direction are preferably designed to be closed. The legs of these arrowheads 50 are connected via interruptions 52 Leg sections 54, between the rear ends of which interruptions 56 are provided.
  • Two such profile sections 48, 48A, each with an arrow tip 50, 50A, are preferably located next to one another, which are of identical design and whose legs 54 each adjoin an interruption 56 at their mutually facing ends.
  • the outer legs 54 are preferably at a short distance from the shoulders 27, 27A and 29, 29A at the ends of the rings, so that here too there is a space between these legs and the wall elements 22, 22A and 30 closing the nip , 30A.
  • the ribs applied to the press surfaces by means of build-up welding have a height h of approximately 3 mm.
  • the tip angle ⁇ is preferably in the order of magnitude between 130 ° and 150 °, and is advantageously approximately 140 °.
  • the described arrangement displaces the air enclosed in the material along the arrow-shaped ribs sideways and backwards, whereby it can escape through the openings 52, 56 of the ribs. This leads to a substantial support for the ventilation of the material, which contributes significantly to the formation of a very uniformly pressed through scoop of high quality.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Press Drives And Press Lines (AREA)
  • Glanulating (AREA)
  • Crushing And Grinding (AREA)
  • Fodder In General (AREA)
EP88111370A 1988-01-26 1988-07-15 Walzenpresse zum Verpressen von feinkörnigen Chemikalien, insbesondere Salzen, zu Schülpen Expired - Lifetime EP0325686B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3802173A DE3802173C1 (enrdf_load_stackoverflow) 1988-01-26 1988-01-26
DE3802173 1988-01-26

Publications (2)

Publication Number Publication Date
EP0325686A1 EP0325686A1 (de) 1989-08-02
EP0325686B1 true EP0325686B1 (de) 1991-12-27

Family

ID=6345981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88111370A Expired - Lifetime EP0325686B1 (de) 1988-01-26 1988-07-15 Walzenpresse zum Verpressen von feinkörnigen Chemikalien, insbesondere Salzen, zu Schülpen

Country Status (10)

Country Link
US (1) US4925382A (enrdf_load_stackoverflow)
EP (1) EP0325686B1 (enrdf_load_stackoverflow)
JP (1) JPH01210026A (enrdf_load_stackoverflow)
BR (1) BR8804426A (enrdf_load_stackoverflow)
CA (1) CA1315937C (enrdf_load_stackoverflow)
DD (1) DD274191A1 (enrdf_load_stackoverflow)
DE (2) DE3802173C1 (enrdf_load_stackoverflow)
ES (1) ES2028199T3 (enrdf_load_stackoverflow)
IL (1) IL87231A (enrdf_load_stackoverflow)
RU (1) RU1831367C (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991002696A1 (de) * 1989-08-19 1991-03-07 Henkel Kommanditgesellschaft Auf Aktien Verfahren zur granulierung von perboratmonohydrat
US5558885A (en) * 1994-10-26 1996-09-24 Casa Herrera, Inc. Inserts for sheeting head
USD632317S1 (en) * 2010-07-01 2011-02-08 Ellison Educational Equipment, Inc. Portable motorized roller press
CN102172492B (zh) * 2010-12-18 2013-06-05 吉林市祥瀚科技开发有限公司 生物质固体燃料造粒机
CN103922095A (zh) * 2013-12-24 2014-07-16 葫芦岛市威力机械制造有限公司 一种双倾斜喂料机
CN107584634B (zh) * 2017-10-25 2023-09-26 湖北亿佳欧电子陶瓷股份有限公司 一种电阻陶瓷泥棒的挤制成型装置
DE102020131638B4 (de) 2020-11-30 2024-03-28 Maschinenfabrik Köppern Gmbh & Co. Kg Verfahren zur Zerkleinerung von Düngemittelschülpen in einer Zweiwalzenmühle
RU2771196C1 (ru) * 2021-05-19 2022-04-28 Акционерное общество "Прорыв" Устройство для гранулирования
DE102023106787B3 (de) 2023-03-17 2024-05-08 Maschinenfabrik Köppern Gmbh & Co. Kg Anlage und Verfahren zur Herstellung von Düngemittelgranulat

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250799B (enrdf_load_stackoverflow) * 1967-09-28
US2919466A (en) * 1958-10-22 1960-01-05 Hoeganaes Sponge Iron Corp Feeding chute for metal powder rolling mill
US2998623A (en) * 1960-02-25 1961-09-05 Building Products Ltd Cheek plates for mill and calender press rolls
DE1567974A1 (de) * 1965-05-22 1970-10-22 Kloeckner Humboldt Deutz Ag Walzwerk zum Verdichten und Stueckigmachen von feinkoernigen Kaliund/oder Steinsalzen
US3570054A (en) * 1968-12-31 1971-03-16 Adamson United Co Automatically adjustable end guides for calender rolls
DE1928176C3 (de) * 1969-06-03 1974-05-16 Maschinenfabrik Koeppern & Co Kg, 4320 Hattingen Walzenbrikettpresse zum Heißverpressen von Kohle, Erzen und ähnlichen Stoffen
BE758545A (fr) * 1969-11-05 1971-04-16 Gen Motors Corp Appareil servant a contenir les rives de produits metalliques lamines aplat
DE2046977C3 (de) * 1970-09-24 1975-12-18 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln Verfahren zum Verdichten und Stückigmachen von feinkörnigen Kohlen ohne zusätzliche Bindemittel
US3781151A (en) * 1972-02-07 1973-12-25 K G Industries Apparatus for agglomerating particulate material
DE2300702A1 (de) * 1973-01-08 1974-07-11 Koeppern & Co Kg Maschf Walzenbrikettpresse
US3886249A (en) * 1973-03-19 1975-05-27 Fmc Corp Production of granular sodium dichloroisocyanurate
US3891494A (en) * 1973-04-26 1975-06-24 Goodyear Tire & Rubber Pricker roll
FR2426564A1 (fr) * 1978-05-26 1979-12-21 Ciments Ste Thionvilloise Presse de compactage de poudre
DE2824827B2 (de) * 1978-06-06 1980-09-11 Maschinenfabrik Koeppern Gmbh & Co Kg, 4320 Hattingen Verfahren zum Verpressen von Salzen auf Walzenpressen
US4441416A (en) * 1981-09-19 1984-04-10 Tokyo Shibaura Denki Kabushiki Kaisha Pressure fixing device
SU1133111A1 (ru) * 1983-06-13 1985-01-07 Московский Ордена Трудового Красного Знамени Институт Химического Машиностроения Приспособление к вальцам дл смешени ,разогрева и пластикации резиновых смесей и полимерных композиций
US4519188A (en) * 1984-03-02 1985-05-28 Sperry Corporation Linkage for equalizing conditioning roll pressure
DE3705051A1 (de) * 1987-02-18 1988-09-01 Kloeckner Humboldt Deutz Ag Walzwerk, insbesondere walzenpresse oder walzenmuehle

Also Published As

Publication number Publication date
DE3802173C1 (enrdf_load_stackoverflow) 1988-09-08
IL87231A (en) 1992-02-16
DE3867222D1 (de) 1992-02-06
EP0325686A1 (de) 1989-08-02
DD274191A1 (de) 1989-12-13
JPH01210026A (ja) 1989-08-23
JPH0569576B2 (enrdf_load_stackoverflow) 1993-10-01
BR8804426A (pt) 1990-04-17
IL87231A0 (en) 1988-12-30
CA1315937C (en) 1993-04-13
US4925382A (en) 1990-05-15
ES2028199T3 (es) 1992-07-01
RU1831367C (ru) 1993-07-30

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